Category Archives: Poinsettia

Upcoming Workshops: The Value of Doing Your OWN Trials, and Poinsettia IPM.

One thing our industry excels at is having numerous industry experts and growers willing to share and discuss their knowledge. Here’s a profile of some upcoming events relating to Greenhouse IPM you can take advantage of. Advertisements

Posted in Bemisia whitefly, biological control, costs, biological control, IPM tools, News, On Farm Research, Poinsettia, Whitefly | Tagged , , , , | Leave a comment

Fainting “Freedom Red”? Wilting “Whitestar”? Potential causes of Poinsettia collapse, solutions, and the importance of testing.

From now until mid-November is when you’ll most likely see plant losses in poinsettia due to severe wilting. These losses can be considerable: anywhere from 2-15% in Niagara operations in past years, with disease pressure seeming especially high this year. Pythium … Continue reading

Posted in biopesticides, diseases, Fungal diseases, Fungicides, Poinsettia, Pythium, Thielaviopsis | Tagged , , , , , | 1 Comment

Thinking ahead: What you can do THIS WEEK to prevent Lewis mite damage in your poinsettias.

2016 turned out to be a bad year for Lewis mite (Eotetranychus lewisi) in poinsettia.  Although it’s too early to say how 2017 is going to go, you should be considering possible preventative measures THIS WEEK for Lewis mite, especially if you … Continue reading

Posted in Bemisia whitefly, Lewis mite, Pest control strategies, Poinsettia, Preventative treatments | Tagged , , , , | 1 Comment

Christmas in July: tips for controlling whitefly in poinsettia. (Hint – start now!).

Poinsettias cuttings are here!   They may only in the greenhouse for a relatively short time, but they can have BIG problems compared to other crops.  Not the least of which is Bemisia whitefly: a pest that can be hard to control with natural enemies and can ALSO be resistant to pesticides.  So what’s a grower […]

Continue reading

Posted in Bemisia whitefly, biological control, dipping cuttings, imported cuttings, Pest control strategies, Poinsettia, Preventative treatments, Registered pesticides, Whitefly | Tagged , , , , , , , , | 3 Comments

Lots and Lots of Lewis mites! (And how to go about controlling them in poinsettia).

You know how I just wrote a post on how you need to look out for unprecedented mealybug infestations in your crop this year?  Well I lied!  Now you need to look out for mealybug AND unusually high numbers of … Continue reading

Posted in Lewis mite, Pest control strategies, pesticides, Poinsettia, Whitefly | Tagged , , , | Leave a comment

Mealybugs…on poinsettia??

Last year several consultants and I noticed something strange.  A number of greenhouses in Ontario had noticeable infestations of mealybug in their poinsettia crop.  This was the first time many in their 25+ year careers had seen this (e.g. see Mel Sawaya’s article … Continue reading

Posted in dipping cuttings, imported cuttings, Mealybug, Poinsettia | Tagged , , , , , , | 2 Comments

Now’s the time to be proactive about poinsettia nutrition

If you’re producing poinsettias this year, you are probably just about finished with potting up your newly rooted cuttings. Keeping an eye on your crop throughout the production cycle will help to identify problems early, and allow you to correct … Continue reading

Posted in Plant nutrition, Plant production, Poinsettia | Tagged , , , , | 1 Comment